221452237165 has 8 divisors (see below), whose sum is σ = 265745226240. Its totient is φ = 177160095312.

The previous prime is 221452237099. The next prime is 221452237187. The reversal of 221452237165 is 561732254122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221452237165 - 2²⁷ = 221318019437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821796 + ... + 1057474.

It is an arithmetic number, because the mean of its divisors is an integer number (33218153280).

Almost surely, 2^221452237165 is an apocalyptic number.

It is an amenable number.

221452237165 is a deficient number, since it is larger than the sum of its proper divisors (44292989075).

221452237165 is a wasteful number, since it uses less digits than its factorization.

221452237165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423611.

The product of its digits is 201600, while the sum is 40.

The spelling of 221452237165 in words is "two hundred twenty-one billion, four hundred fifty-two million, two hundred thirty-seven thousand, one hundred sixty-five".